package main

import (
	"fmt"
)

func main() {
	/*	var c = make(chan bool)
		go func() {
			time.Sleep(time.Second * 5)
			c <- true
		}()

		select {
		case <-c:
			fmt.Println("<Result>")
		case <-time.After(time.Second * 3):
			fmt.Println("<Timeout>")
		}
	*/
	var a string = ""
	b := ":" + a
	if b == ":" {
		fmt.Println(b)
		fmt.Printf("%d", len(b))
	} else {
		fmt.Println(b)
	}

}
